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FAQ

Category: Installation, SimpleSYN Mobile, Version 2.x / 3.x

SimpleSYN Mobile by default uses the following network connection. Those must be allowed::

DNSIP addressesPorts

Desktop app outgoing

simplesyn.app
relay.simplesyn.app
activation.simplesyn.net

40.114.172.2

82.165.22.228

443

443

Desktop app incoming (local computer only)

localhost

127.0.0.1

9238 (default port, configurable)

Device outgoing

simplesyn.app
autodiscover.simplesyn.app
*.simplesyn.app (each installation will get its own sub domain)

40.114.172.2

443

Note: The IP addresses in use may be changing.

Category: General, Installation, SimpleSYN Mobile, Version 2.x / 3.x

You need SimpleSYN Standard or SimpleSYN Business and also SimpleSYN Mobile.

With SimpleSYN Standard or Business you can synchronize Outlook between multiple Windows PCs. If you still want to synchronize mobile devices (smartphones, tablets), then you also need SimpleSYN Mobile.

With SimpleSYN Mobile you can synchronize Outlook on a Windows PC with up to 5 devices (smartphones, tablets).

Category: General, Version 5.x, Version 6.x/7.x

First, empty the Deleted Items folder in Outlook if you no longer need the items.

Also check in the SimpleSYN main window under “Options > Advanced Options” how the “Remove backed up items” selection is set under “Backup”. If the entry is set to “never”, then set a different selection (e.g. after 14 days). Save the changes.

The SimpleSYN backup folder in Outlook is then automatically reduced in size in the background and the old backups are deleted.

Category: Troubleshooting, Version 2.x / 3.x

Restart the Windows PC (do not click “Shut down” and then turn the PC back on, but click “Restart”).

If the behavior occurs again, please send us the log files.

SimpleSYN Mobile includes a built-in function for sending feedback and diagnostic data.

  1. Click on "Information" in the main window and click on "Feedback".
  2. In the next dialog, you can describe your problem and submit your message. The "Include diagnostic data" checkbox shouldbe checked so that we can analyze the problem in detail.

Category: General, Version 5.x, Version 6.x/7.x

The trial versions of SimpleSYN Standard, Business, and Mobile offer the full range of features.

During the trial period, SimpleSYN Standard and Business will only display a notification window upon startup, indicating the remaining trial time, which you must manually confirm.

You can test SimpleSYN free of charge and without obligation for 30 days. After the trial period, further use without a license is no longer possible.

Category: Troubleshooting, Version 5.x, Version 6.x/7.x

Please make a Outlook repair installation on this computer. Please follow this instruction:
https://support.office.com/en-us/Article/Repair-an-Office-application-7821d4b6-7c1d-4205-aa0e-a6b40c5bb88b

Important:

Choose a full online Outlook repair installation and NOT a quick repair.

Category: Troubleshooting, SimpleSYN Mobile, Version 2.x / 3.x

If you want to make a backup of your Outlook data files, disable the synchronization of SimpleSYN Mobile and close the main window. SimpleSYN Mobile then no longer accesses the data files. After the backup, you can re-enable synchronization.

To deactivate the synchronization, right-click on the SimpleSYN Mobile icon in the notification area and select "Disable synchronization" from the context menu.

Category: Troubleshooting, Version 5.x, Version 6.x/7.x

IMAP accounts store your emails directly on your email provider's server. This means your emails are automatically synchronized across all your devices.

Important:
Since IMAP already automatically synchronizes email folders (such as Inbox, Sent Items), additional synchronization of these folders with SimpleSYN is not possible. This would lead to conflicts. Therefore, SimpleSYN does not display these email folders in the "Synchronization Settings" on the client.

 Even though email folders cannot be synchronized with IMAP, other local Outlook data such as:

  • Calendar
  • Contacts
  • Tasks
  • Notes

can be easily synchronized with SimpleSYN. 

If you also want your email folders to be synchronized via SimpleSYN, you should use a POP3 account on all PCs instead.

Category: Troubleshooting, Version 5.x, Version 6.x/7.x

If SimpleSYN cannot establish a connection, please note the following:

  • Installation and execution
    Make sure SimpleSYN is installed and running on both the client and server computers.
  • Correct configuration
    One computer must be configured as the SimpleSYN server, and the other PCs as SimpleSYN clients.
  • Use the same major version
    All computers must be using the same major version of SimpleSYN (e.g., version 6.x). Different major versions (e.g., 5.x and 6.x) are incompatible. You can find the version number in the main window under "Information."
  • Internet connection
    All computers must be connected to the Internet.
  • Check the date and time
    Check that the Windows time, time zone, and date are set the same on all computers.

If these requirements are met, check the "Status" message on the client.

If the client displays "not connected":

  • Open SimpleSYN on the server and go to "Options" to display the server ID.
  • Open SimpleSYN on the client and go to "Options > Connect to a different server."
  • Enter the server ID there.
  • Save the settings.

If the client displays "Authentication failed":

  • Open SimpleSYN on the server.
  • Go to "Synchronization Settings > Manage Users."
  • Select "All Users", assign a new password, and save the page.
  • Open SimpleSYN on the client.
  • Go to "Options" and make sure:
    • "Default" is selected for "Login."
    •  In the "Password" field, enter the new password you assigned on the server.
    • Save the settings.

Category: Operation, Version 5.x, Version 6.x/7.x

SimpleSYN does not synchronize your Outlook data at fixed intervals, but rather as needed. As soon as the SimpleSYN client and server are connected, synchronization runs automatically and almost in real time.

After the initial synchronization, only actual changes to your Outlook data are synchronized – for example, new emails, modifications, or deletions.

Example:
If you create a new calendar appointment, edit, delete, or move an existing one, this change is immediately synchronized across all connected computers. SimpleSYN checks whether the appointment already exists in the calendar.

  • If the appointment does not exist yet, it will be synchronized.
  • If it already exists, it will only be synchronized if it has been modified.

If a computer is currently unavailable, synchronization will automatically resume as soon as the devices are reconnected.

Category: General, Version 5.x, Version 6.x/7.x

How to remove an old Client PC from the Server PC in SimpleSYN:

  1. Open the SimpleSYN main window on the server PC.
  2. Press the Alt key to display the menu bar.
  3. In the View menu, click on Status Properties.
  4. Switch to the General tab.
  5. In the list, find the entry for the old PC or user you want to remove.
  6. Select the corresponding entry and click Remove.

Category: Operation, Version 5.x, Version 6.x/7.x

The SimpleSYN Business Edition can be run as a Windows service. When the option “Start as Windows service” is enabled in the advanced settings, SimpleSYN will automatically start in the background during Windows startup—without requiring a user to log in.

The SimpleSYN Standard Edition does not support this feature. In this version, synchronization only occurs when a user is logged into the computer and SimpleSYN is running.

Category: Installation, Version 5.x, Version 6.x/7.x

You can easily upgrade Outlook to a newer version – there's no need to uninstall the previous version. SimpleSYN will automatically detect the new Outlook version.

Important:
Make sure to install Outlook in the same bit version as before – either 32-bit or 64-bit.

If you want to install Outlook in a different bit version than the previous one, please follow these steps:

  1. First, uninstall SimpleSYN.
  2. Then, update Outlook.
  3. Finally, reinstall SimpleSYN.

Category: Purchase, SimpleSYN Mobile, Version 2.x / 3.x

Licenses are offered as a one time payment or by subscription.

One-time payment:
With a one-time payment, there are no additional monthly or annual fees. The license entitles you to use the currently licensed major version (e.g., version 3.0). Minor updates within this version (e.g., from 3.0 to 3.0.1) are included free of charge. Upgrading to a new major version (e.g., from 3.x to 4) is subject to a fee but is, of course, optional.

Subscription:
With a subscription license, all minor updates and upgrades to new major versions are included.

More information

Category: Installation, Version 6.x/7.x

SimpleSYN supports the following versions of Microsoft Outlook:

  • Microsoft/Office 365® with Outlook® (x86/x64)
  • Outlook® 2024 (x86/x64)
  • Outlook® 2021 (x86/x64)
  • Outlook® 2019 (x86/x64)
  • Outlook® 2016 (x86/x64)
  • Outlook® 2013 (x86/x64)

SimpleSYN also works in mixed environments.

Important:
The classic Outlook for Windows is supported, not the new Outlook app.

Category: Troubleshooting, Version 5.x, Version 6.x/7.x

The behavior can occur if Outlook was installed in a different bit version than the previous version during the new installation. In this case, the bit versions of Outlook and SimpleSYN no longer match and SimpleSYN can no longer be started.

Uninstall SimpleSYN under the Windows control panel (or under "Apps") and then reinstall SimpleSYN.

If the behavior occurs again afterwards, then install SimpleSYN in the correct bit version as follows:

  1. First find out in which bit version (32 bit or 64 bit) Outlook was installed after the reinstallation.
    To do this, open Outlook and click on "File > Office Account > About Outlook". You can see the bit version behind the version number.
  2. Uninstall SimpleSYN from “Windows > Settings > Apps > Installed Apps”.
  3. Then download SimpleSYN and navigate to the directory where the "SimpleSYN.exe" file (for the standard version) or "SimpleSYN_Business.exe" file (for the business version) is located (e.g. on the desktop or in the download folder) .
  4. In this directory, press and hold the „shift" key on the keyboard and right click in a free area and select " Open PowerShell window here " from the context menu.

  5. After that, the Windows PowerShell window will open.

    Now type in the following command and press the ENTER key.

    Note: Pay attention to the correct spelling. There is no space at the beginning of the command between ".\".

    With the standard version:

    When you have installed Outlook in 32-Bit, use the following command:
    .\SimpleSYN.exe Platform=x86

    When you have installed Outlook in 64-Bit, use the following command:
    .\SimpleSYN.exe Platform=x64

    With the business version:

    When you have installed Outlook in 32-Bit, use the following command:
    .\SimpleSYN_business.exe Platform=x86

    When you have installed Outlook in 64-Bit, use the following command:
    .\SimpleSYN_business.exe Platform=x64

  6. You can then install SimpleSYN. After the installation, SimpleSYN is started correctly again.

Category: Troubleshooting, Version 2.x / 3.x

You have probably installed the new major version 3. The version number is displayed in the user interface under “Information.” If you have installed version 3 but prefer to stay with version 2, please follow these steps:

  1. Uninstall Version 3:
    Go to Windows > Settings > Apps > Installed Apps, find SimpleSYN Mobile Version 3 in the list of installed programs, and uninstall it.
  2. Reinstall Version 2:
    Download and install the previous version 2 from the following link:
    https://www.simplesyn.net/Media/Default/Downloads/Mobile/2.8.13611/SimpleSYN_Mobile.exe

After that, everything should work as usual again.

Note:

With a lifetime license, there are no additional monthly/annual costs. The license entitles you to unlimited use of the licensed version (e.g., version 2.0). Minor updates (e.g., version 2.0 to version 2.0.1, etc.) are free. Upgrades to new major versions (e.g., version 2.x to version 3) are subject to a fee, but are of course optional. Subscription licenses include both minor updates and upgrades to new major versions.

With a lifetime license, new major versions are not installed automatically. Instead, they are displayed in the user interface under "Information." This is how we inform customers with a lifetime license that a new major version is available. Lifetime license customers have the opportunity to test the new major version and can manually initiate the download from the user interface.

If you prefer to stay with version 2, you can hide the upgrade notification:

Open the update dialog and click “Do not show this upgrade again” to stop receiving further notifications about version 3.